Sprayer



Nov.l2l, 1950 w. M. VOGEL 2,530,557

SPRAYER Filed NOV. 13, 1946 INVENTOR.

51:1 E l @YW orng Patented Nov. 21, 1950 UNITED-f STATES .TENT orifice SPRAYER.

William Martin Vogel, Montclair, N. J..

ApplicationNovember 13, 1946; `SerialLNoI 709,585.

2 Claims. l.

This invention relates. to insecticide sprayers or atomizers of the kind generally used for the distribution of liquid insecticide, and the invention has for its primary object the; provision of an improved construction of this character whereby better, more effective and more positive results are securedthan with types: ofv spraying devices now in usefor.- the purpose.

An object of the invention is the provision, in a device of this type for the purpose specified, of. means to insurea dense and fine atoinization of the uid tov be distributed; In carrying out the invention, IY provide a. constructionutilizing a liquidy suction tube. of. particular shape; incross section, and this, in combination with certain arrangements of spray' discharge; opening and air-blast openings arranged in alignment, and the arrangement of other parts in the structure, enablesv the invention to effectively` perform the desired spraying action.

Another feature of the invention resides inthe manner in which the liquid suction tube is constructed and. attached to its associated parts; tov the particular shape.- and disposition of said tube andto its coreperation-with. various other elements embodied in the structure tov produce thedesired mode of operation'.

These and other objects are attained by the invention, amore. particular description of which will appear hereinafter and be set forthl in the claims appendedV hereto,

In the accompanying drawing, forming a part hereof, Fig. 1- is a side eleva-tion, with certain parts in section, of4 a spraying device constructed in accordance with the invention; Fig. 2: is a front elevation of the same; Fig. 3 is a sectional View through one of the types of liquid suction tubes successfully employed in. the structure; Fig. 4. is a sectional view. through a suction tube of different cross-sectional shape; Fig. 5 is a sectional view through another type of suction tube; Fig. 6 is a sectional view through a single-piece type-ofzsuction tube, and Fig.- '7 is a sectionalfview through a modified form' ofl suction tube and arrangement of spray holes and air blastopenin'g.

Referring in detail to the accompanying drawing, it will be seen that the improvements are represented as embodied in a sprayingstructure of the character conventionally employed for the purpose of spraying any of the well-known liquid insecticides. This type of sprayer structure includes an air pump provided with an elongated cylinder IB having a piston slidably mounted within it, said piston being attached to a rod which terminates in a handle located exteriorly lil Lul of the rear end of the cylinder. These elements are all of well-known formand with the exceptionof the cylinder IB areomitted from the drawing to simplify illustration of the novel features of the invention.

The device also includes a liquid fuel receptacle, a portion of which is shown at II, the fuel receptacle having a spout arranged to .threadably receive a cap I2, the latter being provided with the threads I3 by means of whichitis detachably secured to the spout ofthe receptacle I I. In the form shown, the cap I-I is provided with a domed top Ill formed with an aperture I5'through which is extended the suctiontube I6. The lower portionof the suction tube, or that part ofthe tube extending below thecap I I, projects. downwardly within the. fuel. receptacle II to reach the contents thereof to. draw the same upwardly for spraying.

The cylinder IU is attach-ed to the top of the capy II by being solderedy or otherwise firmly attached, and. at its forward end the cylinder I0 is provided with aclosure'or head having its central portion bulged forwardly asat I8, the center part of the forwardly-extended part IS being provided-with a depression or recess as indicated at I9. In the center ofthe recess or depression I9 is provided the air blast opening 22` through which ablastof air is forcibly ejected by operation-of the piston within the cylinder lo.

The spray tube I6 has itsupper end portion located. in front of the recess or depression I9 and is slightly spaced ther-efrom, as shown in Fig. 1 and the tube is long enough-to bridge the depression I9. At the top, the tube It is closed. This can` b-e done by pinching the upper end of the tube together, or theclosure of the top end-of the tube can beeffected by solder, as indicated at 2t, the solder used for the purpose being also employed for fastening the upper. end of the tube I-to the head Ifl above the air blast opening 22.

In the arrangement shown in Fig. l, the tube Ihas its-rear wall 2| formed with an. opening 23 and its" front wall 24 formed with the-opening Y 25. Thus, the three openings 22, 2-3, and 25 are in.l axial alignment. In the arrangement shown inFig. l,l the airblast opening 22 is of relatively smail size. Thefopening 23v in the back wall of the tube I-Gmay be-ofsubstantially. the same size 4or possibly slightly larger than the opening 22. The opening 25 in the front wall of the suction `tube is the larger of the three openings. This arrangement of the openings has been found to be very effective in securing extensive and wellydiffused atomizing of the liquid. Another very o effective arrangement of the spray openings is shown in Fig. '7 wherein the two openings in the suction tube, indicated respectively at 23a and 25a, are shown as being substantially of the same size, and both of these holes are larger than the air blast opening 22 with which they are axially aligned. An improved spraying effect over the construction shown in Fig. 1 is attained by the hole arrangement of Fig. '7.

It is to be noted that the production of the recess or depression i9 in the head EI results in the suction tube l being slightly spaced from the head around the air blast opening. This permits of a passage for the escape of excess air forcibly blown through the air blast opening 22. The escape of excess air above the top of the tube i6 is prevented by the soldered connection I'l which acts as a baffle and traps the air tending to escape at the top and limits its escape to movement laterally of the tube I6. Thus the closure 2D at the top of the tube i5 serves to cause the air to be directed through the openings 23 and 25 with any excess thereof directed laterally and beyond the sides of the tube I6.

In cases where it might be found desirable to further restrict or limit the escape of air ejected from air blast opening 22, a second baiile might be employed as indicated at 35 in Fig. 7, the same consisting of solder flowed between the suction tube i9 and head Vi and thus not only serving to aid in trapping the air but also acting to securely attach the tube i6 to the head ll'.

In the operation of the sprayer, when the piston in the cylinder l@ is forced toward the head end l1, strong blasts of air will be ejected through the aligned openings 22, 23 and 25, the air being prevented from upward escape by the closure Vand excess air escaping laterally beyond the sides of the tube l5. The air blasts passing through the opening 22 causes the uid in the receptacle Il to rise into the tube between the opening 23 and 25 where the liquid is caught and discharged through the opening 2E in a fine mist or vapor.

In practice I have found that the cross-sectional shape of the suction tube i6, in conjunction with the spray openings has agreat deal to do with the effectiveness of the spraying results. Thus, by the formation of the suction tube in different cross-sectional shapes, various eiects may be secured. For example, in the structure shown in 1Rigs. I to 3 inclusive, the suction tube E is formed of two strips of metal, namely, a back strip 2l and a front strip 24. The front strip 24 is provided with the edge flanges 26 and 2l shaped to embrace the rear strip 2l between them. The front strip 2d is bulged forwardly on a curved or rounded line into arcuate form as at 30 so that the resultant tube produced is half-cylindrical in cross-sectional shape. With this arrangement the aperture 23 is produced in a flat plate, While the front aperture 25 is thus produced in a curved or arched plate. This combination of semi-cylindrical tube and arrangement of spray openings is eicient in producing Wide distribution of the sprayed material.

When it is found desirable to provide the two openings 23 and 25 in parallel surfaces, a rectangular suction tube of the cross-sectional shape shown in Fig. 4 may be employed. Therein, the

front plate 3l is shaped to have its forward surface flat and substantially parallel to the rear plate 2l. In Fig. 5 the front plate of the tube, indicated at 32 is sharply extended forwardly so that a tube of triangulated cross-sectional shape is the result. In Fig. 6 a modication of the tube shown in Fig. 3 is shown, and wherein the tube is of single piece construction, the same having the rear plate 2l formed integrally with the arched or curved front plate 33.

By the various cross-sectional shapings of the spray tube coupled with various arrangements of the openings in the tube and in the head of the cylinder It spraying effects most suitable to the material being sprayed, the quantity sprayed and the area or distribution of the spray is had and the results most desirable for particular materials and circumstances can be selected and the sprayer constructed accordingly.

While I have shown several embodiments of the invention, it is obvious that the same is not to be restricted thereto but is broad enough to cover all structures coming within the scope of the annexed claims.

What I claim is:

1. In a sprayer of the character described, a pump cylinder having an end wall, a siphon tube having an end portion disposed across said end Wall, the end wall having a hole, the tube having aligned holes in its Walls disposed in alignment with the hole in the end wall and with at least the hole in the front wall of said tube larger than the hole in the end wall, the tube being attached to the'end wall above the aligned holes, closure means for the upper end of the siphon tube, said tube being composed of a pair of united elongated strips, the forward one of said strips being of substantially semi-cylindrical shape and having its edges flanged to embrace the edges of the rea-r strip, the latter strip being relatively flat and disposed toward the end wall of the cylinder.

2. In a sprayer of the character described, a pump cylinder having an end wall, a Siphon tube having an end portion disposed across said end wall, the end wall having a hole, the tube having aligned holes in its walls disposed in alignment with the hole in the end wall and with at least the hole in the front wall of said tube larger than the hole in the end wall, the tube being attached to the end wall and closed at its upper end, said tube being characterized by a flat surfaced rear wall disposed toward the end wall of the -cylinder and a front wall of substantially semi-cylindrical shape.

WILLIAM MARTIN VOGEL.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date '776,556 Sibley et al Dec. 6, 1904 1,209,533 Abbott Dec. 19, 1916 1,891,325 Fitch Dec, 20, 1932 2,123,029 Vogel July 5, 1938 2,126,924 Rose Aug. 16, 1938 

